Merge pull request #155 from SciML/compathelper/new_version/2020-04-14-00-26-50-005-1072249575

CompatHelper: bump compat for "ModelingToolkit" to "3.0"

Author: ChrisRackauckas

Project.toml

@@ -70,7 +70,7 @@ IJulia = "1.20"
 Latexify = "0.12, 0.13"
 MCMCChains = "3.0"
 Measurements = "2.1"
-ModelingToolkit = "0.9, 0.10, 1.0, 2.0"
+ModelingToolkit = "0.9, 0.10, 1.0, 2.0, 3.0"
 NLsolve = "4.2"
 Optim = "0.19, 0.20"
 OrdinaryDiffEq = "5.23"